[issue28647] python --help: -u is misdocumented as binary mode

[Nick Coghlan]

Nick Coghlan added the comment:

I just ran into this discrepancy working on the test cases for PEP 538 - +1 for Gareth's suggested approach of just aligning the `--help` output with the man page.

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nosy: +ncoghlan

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28647>
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